Gear box



FIG. 1 is a front right perspective view of a gear box of my new design;

FIG. 2 is a left side view thereof;

FIG. 3 is a right side view thereof;

FIG. 4 is a front view thereof;

FIG. 5 is a rear view thereof;

FIG. 6 is a top plan view thereof; and,

FIG. 7 is a bottom view thereof.

CLAIM The ornamental design for a gear box, as shown and described.